A giant 'UFO-like' disk of ice on a river has left residents in a small US town baffled.
The bizarre phenomenon has been likened to a crop circle or a giant UFO landing on the water.
The naturally occurring ice circle, believed to be 100 yards wide, has been attracting onlookers from far and wide to the Presumpscot River in Westbrook, Maine, USA.
Doug Bertlesman, who works in a building overlooking the water, said the bizarre formation is "wild".
He told the Press Herald: "It kind of looks like a crop circle. It’s pretty wild to look at.